In Watermill, one half mile from Mecox Bay, a unique opportunity to be only the third owner of a 1937 farmhouse on a farmer's acre overlooking 70 unobstructed acres of pristine farmland.The first level consists of an entry hall, one bedroom, one bathroom, office, kitchen, mud room, laundry roon attached to a two car garage, living room with wood burning fireplace and large family room adjacent to a patio.A second level has a large primary suite with another wood burning fireplace and full ensuite bath. There is a second bedroom with full ensuite bath as well as a third bedroom and bathroom.The eat-in kitchen has a Traulson refridgerator and Gaggenau oven and dishwasher. The house has central air, central vac and a security system. There is a full unfinished basement with a McClain furnace, two hot water heaters, a sump pump and a smasrt water shut-off system.The lush exterior is full of mature trees and plantings as well as a secluded 18 by 45 foot inground gunite pool.The house is on a corner lot with double setbacks and two driveways with room for further expansion.
For sale
Price cut: $295K (9/24)
$6,700,000
18 Horsemill Rd, Water Mill, NY 11976
4beds
4,193sqft
Single Family Residence
Built in ----
-- sqft lot
$6,381,800 Zestimate®
$1,598/sqft
$-- HOA
What's special
Central airThird bedroom and bathroomCentral vacEntry hallGaggenau oven and dishwasherTwo drivewaysEat-in kitchen
- 52 days
- 488
- 15
Zillow last checked:
Listed by:
Robert Ross,
Robert Ross - Real Estate Broker 917-757-5921
Source: Out East,MLS#: 397519
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 4
- Bathrooms: 4
- Full bathrooms: 4
Rooms
- Room types: Family Room, Laundry, Office
Cooling
- Central Air
Features
- Basement: No
- Has fireplace: Yes
Interior area
- Total structure area: 4,193
- Total interior livable area: 4,193 sqft
Property
Parking
- Parking features: GarageAttached
- Has attached garage: Yes
Features
- Stories: 2
- Has private pool: Yes
Details
- Parcel number: 0900116000100015000
Construction
Type & style
- Home type: SingleFamily
- Property subtype: Single Family Residence
Condition
- New construction: No
Community & HOA
Location
- Region: Water Mill
Financial & listing details
- Price per square foot: $1,598/sqft
- Tax assessed value: $3,245,700
- Date on market: 8/29/2026
- Lease term: Contact For Details
Estimated market value
$6,381,800
$6.06M - $6.70M
Not available
Price history
| Date | Event | Price |
|---|---|---|
| 9/24/2026 | Price change | $6,700,000-4.2%$1,598/sqft |
Source: Out East #397519 Report a problem | ||
| 8/29/2026 | Listed for sale | $6,995,000$1,668/sqft |
Source: Out East #397519 Report a problem | ||
| 8/21/2026 | Listing removed | -- |
Source: Owner Report a problem | ||
| 7/27/2026 | Listed for sale | $6,995,000$1,668/sqft |
Source: Owner Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | -- | $3,245,700 |
| 2024 | -- | $3,245,700 |
| 2023 | -- | $3,245,700 |
| 2022 | -- | $3,245,700 |
| 2021 | -- | $3,245,700 -3.6% |
| 2020 | -- | $3,366,700 |
| 2019 | -- | $3,366,700 +2.5% |
| 2018 | -- | $3,285,600 |
| 2017 | $14,455 | $3,285,600 |
| 2016 | -- | $3,285,600 |
| 2015 | -- | $3,285,600 |
| 2014 | -- | $3,285,600 |
| 2013 | -- | $3,285,600 |
| 2012 | -- | $3,285,600 |
| 2011 | -- | $3,285,600 |
| 2007 | $13,584 +3.8% | $3,285,600 +32.1% |
| 2005 | $13,092 +65.4% | $2,486,871 +11138.6% |
| 2004 | $7,916 +5.1% | $22,128 |
| 2003 | $7,532 +2.9% | $22,128 |
| 2002 | $7,318 | $22,128 |
Find assessor info on the county website





